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CP307
Configuration
ID 34424, Rev. 3.0
Page 4 - 11
P R E L I M I N A R Y
4.5.3
Reset Status Register
The Reset Status Register is used to determine the reset source. The I/O location is 0x285.
*
Read/Write Clear. Writing a ’1’ to this bit clears the bit.
Table 4-8:
Reset Status Register
REGISTER NAME
RESET STATUS REGISTER
SIZE
ADDRESS
0x285
8 bits
BIT POSITION
MSB
7
6
5
4
3
2
1
0
LS
B
CONTENT
PRST
Res.
Res.
Res.
Res.
FRST
Res.
WRST
DEFAULT
0
0
0
0
0
0
0
0
ACCESS
R/W
R
R
R
R
R/W
R
R/W
BIT
NAME
DESCRIPTION / FUNCTION
7
PRST
*
0 Indicates the state after setting back the bit
1 Power-on reset (cold start)
6 - 3
Res.
Reserved
2
FRST
*
0 System reset generated by power-on reset
1 System reset generated by front panel reset
1
Res.
Reserved
0
WRST
*
0 System reset generated by power-on reset
1 System reset generated by Watchdog
Note ...
The Reset Status Register is set to the default values by power-on reset, not by
PCI reset.
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